<%

/* hash.asp - by Thomas Kjoernes <thomas@ipv.no> */

var Hash = {

	hexcase: 0,
	b64pad: "",
	chrsz: 8,

	// MD5

	core_md5: function(x, len) {

		function safe_add(x, y) {
			var lsw = (x & 0xFFFF) + (y & 0xFFFF);
			var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
			return (msw << 16) | (lsw & 0xFFFF);
		}

		function bit_rol(num, cnt) {
			return (num << cnt) | (num >>> (32 - cnt));
		}

		function md5_cmn(q, a, b, x, s, t) {
			return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
		}
		function md5_ff(a, b, c, d, x, s, t) {
			return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
		}
		function md5_gg(a, b, c, d, x, s, t) {
			return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
		}
		function md5_hh(a, b, c, d, x, s, t) {
			return md5_cmn(b ^ c ^ d, a, b, x, s, t);
		}
		function md5_ii(a, b, c, d, x, s, t) {
			return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
		}

		x[len >> 5] |= 0x80 << ((len) % 32);
		x[(((len + 64) >>> 9) << 4) + 14] = len;

		var a =	1732584193;
		var b = -271733879;
		var c = -1732584194;
		var d =	271733878;

		for(var i = 0; i < x.length; i += 16) {
			var olda = a;
			var oldb = b;
			var oldc = c;
			var oldd = d;

			a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
			d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
			c = md5_ff(c, d, a, b, x[i+ 2], 17,	606105819);
			b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
			a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
			d = md5_ff(d, a, b, c, x[i+ 5], 12,	1200080426);
			c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
			b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
			a = md5_ff(a, b, c, d, x[i+ 8], 7 ,	1770035416);
			d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
			c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
			b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
			a = md5_ff(a, b, c, d, x[i+12], 7 ,	1804603682);
			d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
			c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
			b = md5_ff(b, c, d, a, x[i+15], 22,	1236535329);

			a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
			d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
			c = md5_gg(c, d, a, b, x[i+11], 14,	643717713);
			b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
			a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
			d = md5_gg(d, a, b, c, x[i+10], 9 ,	38016083);
			c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
			b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
			a = md5_gg(a, b, c, d, x[i+ 9], 5 ,	568446438);
			d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
			c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
			b = md5_gg(b, c, d, a, x[i+ 8], 20,	1163531501);
			a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
			d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
			c = md5_gg(c, d, a, b, x[i+ 7], 14,	1735328473);
			b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

			a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
			d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
			c = md5_hh(c, d, a, b, x[i+11], 16,	1839030562);
			b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
			a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
			d = md5_hh(d, a, b, c, x[i+ 4], 11,	1272893353);
			c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
			b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
			a = md5_hh(a, b, c, d, x[i+13], 4 ,	681279174);
			d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
			c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
			b = md5_hh(b, c, d, a, x[i+ 6], 23,	76029189);
			a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
			d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
			c = md5_hh(c, d, a, b, x[i+15], 16,	530742520);
			b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

			a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
			d = md5_ii(d, a, b, c, x[i+ 7], 10,	1126891415);
			c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
			b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
			a = md5_ii(a, b, c, d, x[i+12], 6 ,	1700485571);
			d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
			c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
			b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
			a = md5_ii(a, b, c, d, x[i+ 8], 6 ,	1873313359);
			d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
			c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
			b = md5_ii(b, c, d, a, x[i+13], 21,	1309151649);
			a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
			d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
			c = md5_ii(c, d, a, b, x[i+ 2], 15,	718787259);
			b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

			a = safe_add(a, olda);
			b = safe_add(b, oldb);
			c = safe_add(c, oldc);
			d = safe_add(d, oldd);
		}
		return Array(a, b, c, d);

	},

	core_hmac_md5: function(key, data) {
		var bkey = this.str2binl(key);
		if(bkey.length > 16) bkey = core_md5(bkey, key.length * this.chrsz);

		var ipad = Array(16), opad = Array(16);
		for(var i = 0; i < 16; i++) {
			ipad[i] = bkey[i] ^ 0x36363636;
			opad[i] = bkey[i] ^ 0x5C5C5C5C;
		}

		var hash = this.core_md5(ipad.concat(this.str2binl(data)), 512 + data.length * this.chrsz);
		return this.core_md5(opad.concat(hash), 512 + 128);
	},

	md5: function(s) { return this.binl2hex(this.core_md5(this.str2binl(s), s.length * this.chrsz)); },

	hmacMd5: function(key, data) { return this.binl2hex(this.core_hmac_md5(key, data)); },

	// SHA-1

	core_sha1: function(x, len) {

		function safe_add(x, y) {
			var lsw = (x & 0xFFFF) + (y & 0xFFFF);
			var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
			return (msw << 16) | (lsw & 0xFFFF);
		}

		function bit_rol(num, cnt) {
			return (num << cnt) | (num >>> (32 - cnt));
		}

		function sha1_ft(t, b, c, d) {
			if(t < 20) return (b & c) | ((~b) & d);
			if(t < 40) return b ^ c ^ d;
			if(t < 60) return (b & c) | (b & d) | (c & d);
			return b ^ c ^ d;
		}

		function sha1_kt(t) {
			return (t < 20) ?	1518500249 : (t < 40) ?	1859775393 : (t < 60) ? -1894007588 : -899497514;
		}

		x[len >> 5] |= 0x80 << (24 - len % 32);
		x[((len + 64 >> 9) << 4) + 15] = len;

		var w = Array(80);
		var a =	1732584193;
		var b = -271733879;
		var c = -1732584194;
		var d =	271733878;
		var e = -1009589776;

		for(var i = 0; i < x.length; i += 16)
		{
			var olda = a;
			var oldb = b;
			var oldc = c;
			var oldd = d;
			var olde = e;

			for(var j = 0; j < 80; j++)
			{
				if(j < 16) w[j] = x[i + j];
				else w[j] = bit_rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);
				var t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)),
						safe_add(safe_add(e, w[j]), sha1_kt(j)));
				e = d;
				d = c;
				c = bit_rol(b, 30);
				b = a;
				a = t;
			}

			a = safe_add(a, olda);
			b = safe_add(b, oldb);
			c = safe_add(c, oldc);
			d = safe_add(d, oldd);
			e = safe_add(e, olde);
		}
		return Array(a, b, c, d, e);

	},

	core_hmac_sha1: function(key, data) {
		var bkey = str2binb(key);
		if(bkey.length > 16) bkey = core_sha1(bkey, key.length * this.chrsz);

		var ipad = Array(16), opad = Array(16);
		for(var i = 0; i < 16; i++)
		{
			ipad[i] = bkey[i] ^ 0x36363636;
			opad[i] = bkey[i] ^ 0x5C5C5C5C;
		}

		var hash = core_sha1(ipad.concat(str2binb(data)), 512 + data.length * this.chrsz);
		return core_sha1(opad.concat(hash), 512 + 160);
	},

	str2binl: function(str) {
		var bin = Array();
		var mask = (1 << this.chrsz) - 1;
		for(var i = 0; i < str.length * this.chrsz; i += this.chrsz)
		bin[i>>5] |= (str.charCodeAt(i / this.chrsz) & mask) << (i%32);
		return bin;
	},

	binl2hex: function(binarray) {
		var hex_tab = this.hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
		var str = "";
		for(var i = 0; i < binarray.length * 4; i++)
		{
		 str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
				  hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
		}
		return str;
	},

	str2binb: function(str) {
		var bin = Array();
		var mask = (1 << this.chrsz) - 1;
		for(var i = 0; i < str.length * this.chrsz; i += this.chrsz)
			bin[i>>5] |= (str.charCodeAt(i / this.chrsz) & mask) << (32 - this.chrsz - i%32);
		return bin;
	},

	binb2str: function(bin) {
		var str = "";
		var mask = (1 << this.chrsz) - 1;
		for(var i = 0; i < bin.length * 32; i += this.chrsz)
			str += String.fromCharCode((bin[i>>5] >>> (32 - this.chrsz - i%32)) & mask);
		return str;
	},

	binb2hex: function(binarray) {
		var hex_tab = this.hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
		var str = "";
		for(var i = 0; i < binarray.length * 4; i++)
		{
			str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
						 hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8	)) & 0xF);
		}
		return str;
	},

	binb2b64: function(binarray) {
		var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
		var str = "";
		for(var i = 0; i < binarray.length * 4; i += 3)
		{
			var triplet = (((binarray[i	 >> 2] >> 8 * (3 -	i	 %4)) & 0xFF) << 16)
									| (((binarray[i+1 >> 2] >> 8 * (3 - (i+1)%4)) & 0xFF) << 8 )
									|	((binarray[i+2 >> 2] >> 8 * (3 - (i+2)%4)) & 0xFF);
			for(var j = 0; j < 4; j++)
			{
				if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
				else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
			}
		}
		return str;
	},

	sha1: function(s) { return this.binb2hex(this.core_sha1(this.str2binb(s),s.length * this.chrsz)); },

	hmacSha1: function(key, data) { return this.binb2hex(this.core_hmac_sha1(key, data)); }

};

%>